An inverter-driven rotating machine system is provided in which three-phase AC electric power of the inverter is supplied to a rear motor generator by using a cable. One end of an additional cable is connected to rotating machine terminals, namely motor input terminals of a motor case. The other end is connected to fixed voltage terminals, namely inverter additional terminals on an outer case of the inverter via resistors.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An inverter-driven rotating machine system comprising: an inverter for outputting three-phase AC electric power; a rotating machine driven by the output of said inverter; a cable used to supply the output of said inverter to said rotating machine; and an additional cable having one end connected to a terminal of said rotating machine and the other end connected to a fixed voltage terminal.
2. The inverter-driven rotating machine system according to claim 1 , wherein the other end of said additional cable is connected to said fixed voltage terminal via a resistor or a circuit formed by combining a resistor with a capacitor.
3. The inverter-driven rotating machine system according to claim 1 , wherein said additional cable greatly attenuates a high frequency; and the other end of said additional cable is directly connected to said fixed voltage terminal.
4. The inverter-driven rotating machine system according to claim 1 , wherein said fixed voltage terminal is any one of: a corresponding phase voltage output terminal of said inverter to a voltage input terminal of said rotating machine, the corresponding phase voltage output terminal being connected with the voltage input terminal of said rotating machine by using said additional cable; a corresponding phase voltage input terminal of said rotating machine; the ground; a DC smoothing capacitor terminal placed inside said inverter; a battery terminal; an input power source line of said inverter; or the neutral point of the input power source line.
5. An inverter which outputs three-phase AC electric power and is used in an inverter-driven rotating machine system comprising: the inverter; a rotating machine which is driven by the output of the inverter; and a cable which is used to supply the output of the inverter to said rotating machine, the inverter comprising: a first terminal to which said cable is connected; and a second terminal to which an additional cable is connected.
6. The inverter according to claim 5 , further comprising: a resistor or a circuit formed by combining a resistor with a capacitor, said resistor or said circuit being connected to said second terminal.
7. A rotating machine which is driven by the output of an inverter and is used in an inverter-driven rotating machine system comprising: an inverter which outputs three-phase AC electric power; the rotating machine; and a cable which is used to supply the output of said inverter to the rotating machine, the rotating machine comprising a first terminal to which said cable is connected and a second terminal to which an additional cable is connected.
8. An electric vehicle comprising an inverter-driven rotating machine system including: an inverter which outputs three-phase AC electric power; a rotating machine which is driven by the output of said inverter; and a cable which is used to supply the output of said inverter to said rotating machine; wherein an additional cable having one end connected to a terminal of said rotating machine and the other end connected to a fixed voltage terminal.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
June 25, 2007
July 27, 2010
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